Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression

/
/
ism

Test String

Code Generator

Generated Code

# coding=utf8 # the above tag defines encoding for this document and is for Python 2.x compatibility import re regex = r"Date:\n(.*)\n\nNumber" test_str = ("Voice Mail Message: Double click on the attachment to play the voice mail file.\n\n" "Date:\n" "12/01/2014 01:28:36 PM\n\n" "Number:\n" "800-123-4567, JOHN SMITH\n\n" "CallerID:\n" "123-456-7890, JANE DOE\n\n" "Destination:\n" "Voice Mail\n\n" "File Duration:\n" "00:00:37\n\n" "======================\n\n" "Name : Jane Doe\n\n" "Address : 123 Fake Street , Miami , Florida \n\n" "Phone : 123-456-7890\n\n" "Ye, my name is Jane Doe. I own the property at 123 Fake Street , Miami , Florida. You sent me a couple of postcards. Let me know if you're interested in making an offer. it's a single family home.3 bedrooms, 2 baths. Has a single efficiency in the back, that's an additional rental income.\n\n" "Again, Jane Doe and that's 123 Fake Street and my phone number is 123-456-7890. Thanks !\n") matches = re.search(regex, test_str, re.IGNORECASE | re.DOTALL | re.MULTILINE) if matches: print ("Match was found at {start}-{end}: {match}".format(start = matches.start(), end = matches.end(), match = matches.group())) for groupNum in range(0, len(matches.groups())): groupNum = groupNum + 1 print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = matches.start(groupNum), end = matches.end(groupNum), group = matches.group(groupNum))) # Note: for Python 2.7 compatibility, use ur"" to prefix the regex and u"" to prefix the test string and substitution.

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html